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Wednesday, June 18, 2025

Zhuo Yao, Ph.D.

Professional Website of Dr. Zhuo Yao
Zhuo Yao, Ph.D.
Professional Website of Dr. Zhuo Yao
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Author: calsalmon

R

R Regular Expression

calsalmon February 16, 2015

R has various functions for regular expression based match and replaces. The grep,grepl, regexpr and gregexpr functions are used for searching for matches, while sub…

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NotePad++

Batch convert pdf to Excel

calsalmon February 16, 2015

You can use an Action in Adobe Acrobat Pro to convert your PDF files to Excel in one operation. To do that, create a new…

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R

Text Mining the Complete Works of William Shakespeare

calsalmon February 16, 2015

I am starting a new project that will require some serious text mining. So, in the interests of bringing myself up to speed on the…

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R

PDF-2-text-or-CSV.r

calsalmon February 14, 2015

# Here are a few methods for getting text from PDF files. Do read through # the instructions carefully! NOte that this code is written…

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R

Convert PDFs to text files or CSV files (DfR format) with R

calsalmon February 14, 2015

# download pdftotxt from # ftp://ftp.foolabs.com/pub/xpdf/xpdfbin-win-3.03.zip # and extract to your program files folder # here is a pdf for mining url <- “http://www.noisyroom.net/blog/RomneySpeech072912.pdf” dest…

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R

Extracting Text from PDFs; Doing OCR; all within R

calsalmon February 13, 2015

I am a huge fan of Ben Marwick. He has so many useful pieces of code for the programming archaeologist or historian! Edit July 17…

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R

PDF-2-text-or-CSV.r

calsalmon February 13, 2015

# Here are a few methods for getting text from PDF files. Do read through # the instructions carefully! NOte that this code is written…

View More PDF-2-text-or-CSV.r
Writing

Word 2010 Shortcut Key Reference

calsalmon February 10, 2015

Shortcut Key Reference The following table lists the default shortcut keys (which are also called keyboard shortcuts or key combinations) that are available in Word.…

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linux

How To Manage Packages In Ubuntu and Debian With Apt-Get & Apt-Cache

calsalmon February 9, 2015

What is Apt-Get? Apt is a command line frontend for the dpkg packaging system and is the preferred way of managing software from the command…

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linux

How To Install Linux, Apache, MySQL, PHP (LAMP) stack on Ubuntu 14.04

calsalmon February 9, 2015

Introduction A “LAMP” stack is a group of open source software that is typically installed together to enable a server to host dynamic websites and…

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  • RStudio Theme
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  • Random utility model and the multinomial logit model
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